9
5
2
1
6
3
7
4
9
6
2
4
9
6
3
1
4
9
1
2
7
4
5
3
9

This Sudoku Puzzle has 63 steps and it is solved using Hidden Single, Locked Candidates Type 1 (Pointing), Naked Triple, Naked Single, Swordfish, Full House techniques.

Naked Single Explanation
Hidden Single Explanation
Locked Candidates Explanation
Full House Explanation
Try To Solve This Puzzle

Solution Steps:

  1. Row 2 / Column 4 → 9 (Hidden Single)
  2. Row 3 / Column 1 → 4 (Hidden Single)
  3. Row 6 / Column 2 → 9 (Hidden Single)
  4. Row 9 / Column 3 → 2 (Hidden Single)
  5. Row 4 / Column 7 → 9 (Hidden Single)
  6. Row 7 / Column 6 → 9 (Hidden Single)
  7. Locked Candidates Type 1 (Pointing): 6 in b1 => r7c3<>6
  8. Locked Candidates Type 1 (Pointing): 2 in b2 => r1c78<>2
  9. Row 6 / Column 7 → 2 (Hidden Single)
  10. Locked Candidates Type 1 (Pointing): 5 in b6 => r3c9<>5
  11. Locked Candidates Type 1 (Pointing): 7 in b6 => r9c8<>7
  12. Naked Triple: 5,7,8 in r2c5,r3c46 => r1c46<>5, r1c46<>8
  13. Row 1 / Column 7 → 5 (Hidden Single)
  14. Naked Triple: 5,6,8 in r8c125 => r8c6<>5, r8c689<>8, r8c89<>6
  15. Row 8 / Column 6 → 1 (Naked Single)
  16. Swordfish: 5 r359 c246 => r4c46,r6c46,r8c2<>5
  17. Row 8 / Column 2 → 8 (Naked Single)
  18. Row 1 / Column 2 → 3 (Naked Single)
  19. Row 2 / Column 8 → 3 (Hidden Single)
  20. Row 2 / Column 9 → 2 (Hidden Single)
  21. Row 8 / Column 9 → 4 (Naked Single)
  22. Row 8 / Column 8 → 2 (Naked Single)
  23. Row 2 / Column 2 → 1 (Hidden Single)
  24. Row 4 / Column 8 → 4 (Hidden Single)
  25. Row 4 / Column 3 → 1 (Hidden Single)
  26. Row 5 / Column 4 → 1 (Hidden Single)
  27. Row 5 / Column 8 → 7 (Hidden Single)
  28. Row 5 / Column 2 → 5 (Naked Single)
  29. Row 5 / Column 6 → 8 (Full House)
  30. Row 9 / Column 2 → 7 (Full House)
  31. Row 7 / Column 3 → 3 (Naked Single)
  32. Row 9 / Column 7 → 8 (Naked Single)
  33. Row 7 / Column 1 → 6 (Naked Single)
  34. Row 8 / Column 1 → 5 (Full House)
  35. Row 8 / Column 5 → 6 (Full House)
  36. Row 3 / Column 7 → 1 (Naked Single)
  37. Row 7 / Column 7 → 7 (Full House)
  38. Row 9 / Column 8 → 6 (Naked Single)
  39. Row 7 / Column 9 → 1 (Full House)
  40. Row 7 / Column 4 → 8 (Full House)
  41. Row 1 / Column 8 → 8 (Full House)
  42. Row 3 / Column 9 → 6 (Full House)
  43. Row 3 / Column 4 → 5 (Naked Single)
  44. Row 1 / Column 3 → 6 (Naked Single)
  45. Row 3 / Column 6 → 7 (Naked Single)
  46. Row 3 / Column 3 → 8 (Full House)
  47. Row 2 / Column 1 → 7 (Full House)
  48. Row 2 / Column 5 → 8 (Full House)
  49. Row 6 / Column 3 → 7 (Full House)
  50. Row 9 / Column 4 → 3 (Naked Single)
  51. Row 9 / Column 6 → 5 (Full House)
  52. Row 6 / Column 5 → 5 (Naked Single)
  53. Row 4 / Column 5 → 7 (Full House)
  54. Row 4 / Column 4 → 2 (Naked Single)
  55. Row 6 / Column 9 → 8 (Naked Single)
  56. Row 4 / Column 9 → 5 (Full House)
  57. Row 1 / Column 4 → 4 (Naked Single)
  58. Row 1 / Column 6 → 2 (Full House)
  59. Row 6 / Column 4 → 6 (Full House)
  60. Row 4 / Column 6 → 3 (Naked Single)
  61. Row 4 / Column 1 → 8 (Full House)
  62. Row 6 / Column 1 → 3 (Full House)
  63. Row 6 / Column 6 → 4 (Full House)
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